Figure 4-22. Prover Module Terminations 
4.2.1  Digital Inputs (DIGIN) 
Each plug-in module has 32 optically-isolated digital inputs (DIGIN). 
The digital inputs have been grouped into four banks of 4-off single-
ended inputs with one common feed.  
The sample period is less than 1 second. 
The DIGIN channels use the SKT-E and SKT-F connectors located on 
the backplate of the Prover module. Refer to Tables 4-15 and 4-16 for 
the DIGIN pin connections.